Astro Van AWD V6-4.3L VIN X (2003)
Alignment: Service and Repair
Front Wheel Alignment
Front Caster and Camber Adjustment
Front Caster and Camber Adjustment
The caster and camber adjustments are made by rotating the offset cam bolt and the cam in the slotted frame bracket in order to reposition the control
arm.
Important:
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Before adjusting the caster and the camber angles, jounce the front bumper 3 times to allow the vehicle to return to the normal height.
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Measure and adjust the caster and the camber with the vehicle at curb height. The front suspension Z dimension and the rear suspension D
dimension are indicated in Trim Heights.
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When checking the left and the right side caster, the right side minus the left side must be equal within 0 degrees to 2.0 degrees.
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When setting the left and the right side caster, the right side minus the left side must be equal within 0.50 degrees to 1.50 degrees.
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When checking the camber, it must be equal within 1.0 degrees.
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When setting the camber, it must be equal within 0.50 degrees.
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The caster and the camber set is relative to the ground.
Important: When this camber adjustment is followed, the caster setting will not be affected.
1. If the camber is not within specifications, adjust the camber using the following procedure:
1.1.
Hold the cam bolt (6) and loosen the nut (2).
1.2.
Rotate the cam (1) by rotating the bolt head (6).
Turn the cam bolt in order to obtain change equal to 4/2 of the needed correction.
1.3.
Hold the cam bolt (6) in this position in order to maintain the setting.
1.4.
Obtain the remaining 1/2 of the needed correction by repeating steps 1 through 3 to the other cam bolt.
Turn the cam lobe in the same direction.
2. If the caster is not within specifications, adjust the caster using the following procedure:
2.1.
Note the camber reading.
2.2.
Hold the front cam bolt (6) and loosen the nut (2).
2.3.
Turn the front cam bolt in order to obtain a change equal to 1/4 of the desired caster change.
At the front cam bolt, a positive camber change produces a positive caster change and a negative camber change produces a negative caster
change.
2.4.
Hold the cam bolt (6) in this position while tightening the nut (2) in order to maintain setting.
2.5.
Hold the rear cam bolt (6) and loosen the nut (2).
2.6.
In order to return the camber to the setting that you noted earlier, turn the cam bolt (6) by turning the cam lobe (1) in the opposite direction.
2.7.
Check the caster setting. Repeat the above procedure if not within specifications
Notice: Refer to Fastener Notice in Service Precautions.
2.8.
When adjustments are complete, hold the cam bolt (6) head in order to ensure the cam position does not change while tightening the upper
control arm mounting nut.
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Tighten the upper control arm mounting nut to 140 Nm (103 ft. lbs.).
Front Wheel Toe Adjustment
Front Toe Adjustment
The toe-in can be increased or decreased by changing the length of the tie rods. A threaded sleeve is provided for this purpose. When the tie rods are
mounted ahead of the steering knuckle, the tie rods must be modified as follows:
